Ill-defined lytic jaw lesion

Dentigerous cyst, also known as follicular cyst is an epithelial-lined developmental cyst formed by accumulation of fluid between the reduced enamel epithelium and crown of an unerupted tooth. It is formed when there is an alteration in the reduced enamel epithelium and encloses the crown of an unerupted tooth at the cemento-enamel junction. [Source: Wikipedia ]

May Be Caused by

Common: Actinomycosis; Chondrosarcoma; Chronic alveolar abscess; Chronic osteitis; Ewing sarcoma; Fibrosarcoma; Hemangioendothelioma/angiosarcoma; Langerhans cell histiocytosis; Liposarcoma; Malignant peripheral nerve sheath tumor; Metastasis; Multiple myeloma; Noma; Osteolytic osteosarcoma; Osteomyelitis; Plasmacytoma; Squamous cell carcinoma; Syphilis
Uncommon: Ameloblastoma; Aneurysmal bone cyst; Arteriovenous malformation; Burkitt lymphoma; Desmoplastic fibroma; Fibrous dysplasia; Hemangioma; Hematopoietic bone marrow defect; Leukemia; Lymphoma; Lymphosarcoma; Malignant fibrous histiocytoma; Malignant minor salivary gland tumor; Massive osteolysis; Melanotic neuroectodermal tumor of infancy; Odontogenic fibroma; Odontogenic myxoma; Odontogenic sarcoma; Osteoblastoma; Paget disease of bone; Primary intraosseous carcinoma; Radiation necrosis; Sarcoidosis; Spindle cell carcinoma; Surgical defect; Tuberculosis